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PWM인버터의 출력 LC필터에 의한 공진전압 억제 기법
최경진(G.J. Choi),전태원(T.W. Chun),이홍희(H.H. Lee),노의철(E.C. Nho),김흥근(H.G Kim) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
The LC filter has been generally used to filter the output voltage of PWM inverter to the sinusoidal waveform. The resonant voltage on the output voltage of PWM inverter may be generated due to LC filter. This paper proposed the algorithm to damp the resonant voltage using the virtual resistor without decreasing the efficiency by the power loss in the real resistor. The method is appled to the vector controlled induction motor driven by the PWM inverter with the LC filter. The simulation results are carried out to verify the performances of the proposed algorithm.
유도 전동기를 이용한 플라이휠 에너지 저장 및 재생 시스템 제어 기법
손장경(J.K. Son),전태원(T.W. Chun),최경진(G.J. Choi),노의철(E.C. Nho),김흥근(H.G. Kim) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
This paper proposed a control strategy for flywheel energy/recovery system with induction machine. The system is based on a vector controlled induction machine driving a flywheel and address the problem of regulating the DC-Link system voltage against input power shut-down. And we proposed the method to damp the oscillation of DC-Link. Experimental results are presented which verify the performance of the strategy.
전력품질을 고려한 다이나믹 UPS 시스템의 Sag-Swell 발생기
안종수(J.S.Ahn),최경진(K.J.Choi),전태원(T.W.Chun),노의철(E.C.Nho),김인동(I.D.Kim),김흥근(H.G.Kim) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
This paper describes a new Sag-Swell generator for the test of custom power devices such as UPS, DVR, DSTATCOM, SSTS, etc The proposed scheme has good features of simple structure, high reliability, wide range of sag and Swell variation, and easy control Outage, harmonic distortion, notches, and voltage unbalance also can be generated The operation principle of the proposed scheme is described and verified through simulations.